Biology and Physics? Biophysics, biomimetics ?

I am a grade 12 physics student and I am looking into potential topics/concepts for an upcoming physics 'fair-style' project. I have a stong interest in biology, especially zoology, and would like to come up with a project that incorporates both disciplines of science. The assignment is to create a display (including informative posters, hands-on activities, demonstration, etc) and an 8-10 minute presentation, designed to entertain and educate students (from grades 9-12) from my school. Topic choice is pretty open, buy the presentation/display needs to outline one or more physics concept.

Perhaps organic solar cells could be an interesting topic. Maybe explain solar spectrum and how our eye got adapted. Describe how does measuring process of some animals look like... there are quite many topics out there, all could be interesting or very boring.

The physics of how senses work is a good topic? How does the human eye work? What is the role of the cones, rods etcetera. How does the eye respond to different light levels and different wavelengths within the visible spectrum? What is the Purkinje Effect?

Human hearing is also a good one - how does the human ear detect frequency? what is the role of the cochlea? Hair cells in the cochlea?

Other animals also have interesting senses you could use: A snake's sense of smell. How an electric eel uses an electric field to sense its surroundings. Etc.